Any form of water, such as rain, snow, sleet, or hail, that falls to the earth's surface, Rapid motion; a hurrying or rushing onward, meteorology Any or all of the forms of water particles, whether liquid or solid, that fall from the atmosphere (e.g., rain, hail, snow or sleet). It is a major class of hydrometeor, but it is distinguished from cloud, fog, dew, rime, frost, etc., in that it must fall. It is distinguished from cloud and virga in that it must reach the ground